Jinn of Quality and Risk (2003-Feb-26)

Jinn?

According to critics, an eavesdropper, constantly striving to go behind the curtains of heaven in order to steal divine secrets. May grant wishes. or use my wishlist (at amazon.com) if you are in the mood for gifts.

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Projects

~~Find a new job, now. Move home, this month.~~ Finish my book, asap. Read, more. Sleep, less. ~~Travel, v.soon.~~

Bio?

Species: featherless biped, chocolate addict
Roots: born in Sweden — lived also in Switzerland, USA, UK — mixed up genes from Sweden, Norway, India, Germany
Languages: French, English, Swedish, German, Portuguese, Latin, Ada, Perl, Java, assembly languages, Pascal, C/C++, etc.
Roles: programme manager, methodology lead, quality and risk manager, writer, director of technology, project lead, solutions architect — as well as gardener, factory worker, farmhand, supermarket cleaner, programmer, student, teacher, language lawyer, traveller, soldier, lecturer, software engineer, philosopher, consultant

2003-Feb-26

Measuring electronic storage, with binary or decimal units?

Since the early 1990s, disk and memory manufacturers have been counting differently. Memory manufacturers use powers of 2; hence a megabyte of RAM is 2 to the 20 and a gigabyte is 2 to the 30. Disk manufacturers, however, use powers of 10; hence a megabyte on disk is 10 to the 6 and a gigabyte is 10 to the 9. Close, but not the same. The exact difference is that 1024 (2 to then 10) is a bit more than 1000 (10 to the 3) and higher powers compound the difference.

Thus, with the exception of RAM, base ten units are used for specifying storage amounts. RAM space should be quoted in MiB or GiB, but is often mistakenly written as MB or GB. See NIST: Prefixes for Binary Multiples for information on binary and base-ten SI units. [via Macintouch]

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